Hypertension is a clinical syndrome characterized by elevated arterial pressure in the body circulation and can be divided into two main categories: primary and secondary. Those with unknown causes are called primary hypertension, also known as hypertension, accounting for more than 95% of the total hypertensive patients; in less than 5% of patients, elevated blood pressure is a clinical manifestation of certain diseases, which themselves have a clear and independent cause, called secondary hypertension. According to the results of the third hypertension survey in 1991, the prevalence of hypertension in China was 11.26%. According to Chinese medicine, this disease belongs to the category of “vertigo”, “headache”, “stroke” and other evidence. The pathogenesis of the disease is mainly attributed to the deficiency of the root and the symptoms of the disease, and the disease is located in the liver, heart and kidney. Clinical manifestations Symptoms: Mild headache, dizziness, tinnitus, neck dullness, insomnia, aggravated by stress or exertion, often relieving on its own, or asymptomatic. In hypertensive crisis attack, palpitations, dry mouth, excessive sweating, pale or red skin, irritability, tremor, and ischemic symptoms in the affected organs due to arterial spasm. In hypertensive encephalopathy, there is diffuse severe headache, altered consciousness, and even coma and focal or generalized convulsions. Signs: hyperacusis of the aortic valve second heart sound, systolic murmur in the aortic valve region or early systolic karate may be heard. Long-term persistent hypertension may be associated with left ventricular hypertrophy and a fourth heart sound may be heard. Routine tests: blood lipids, blood glucose and electrolytes, blood urea nitrogen, blood creatinine, blood uric acid, urine routine (including PH), electrocardiogram, fundus examination, chest X-ray, cardiac ultrasound, 24-hour urine microprotein measurement if necessary. The above examinations can provide the basis for the diagnosis of primary hypertension, understanding the functional status of target organs and the correct choice of therapeutic drugs. Ambulatory blood pressure monitoring: Blood pressure can be measured automatically by the instrument at regular intervals of 15-30 minutes for 24 hours or longer. It can measure the average value and dispersion of blood pressure at each time of day and night, which can reflect the actual blood pressure level in a more sensitive and objective way. It is often used to diagnose white coat hypertension; determine the degree of blood pressure condition; evaluate hypertension treatment; analyze the causes of myocardial ischemia or cardiac arrhythmia. There is no uniform normal value of ambulatory blood pressure, at present, the following criteria are mostly used: 10% of the 24-hour average blood pressure value, if the blood pressure is reduced by less than 10%, it can be considered that the blood pressure circadian rhythm disappears. If necessary, blood and urine catecholamines (CA), plasma renin activity (PRA), angiotensin II (Ang II) and aldosterone (ALD) concentrations should be measured; nuclear renal perfusion imaging and Kaibertone test; ultrasound or CT examination of the adrenal glands and other parts; renal arteriography to provide clues for the diagnosis of secondary hypertension. Diagnostic criteria The diagnosis of hypertension is based on the average of 2 or more repeated blood pressure measurements at rest and in a non-drug state on non-same day. Currently, China adopts the 1999 WHO/ISH criteria, i.e., a systolic blood pressure ≥ 140 mmHg and/or a diastolic blood pressure ≥ 90 mmHg is diagnosed as hypertension.